1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "IOEventLoop.h"
#include <gtest/gtest.h>
#include <atomic>
#include <chrono>
#include <thread>
TEST(IOEventLoop, read) {
int fd[2];
ASSERT_EQ(0, pipe(fd));
IOEventLoop loop;
int count = 0;
int retry_count = 0;
ASSERT_NE(nullptr, loop.AddReadEvent(fd[0], [&]() {
while (true) {
char c;
int ret = read(fd[0], &c, 1);
if (ret == 1) {
if (++count == 100) {
return loop.ExitLoop();
}
} else if (ret == -1 && errno == EAGAIN) {
retry_count++;
break;
} else {
return false;
}
}
return true;
}));
std::thread thread([&]() {
for (int i = 0; i < 100; ++i) {
usleep(1000);
char c;
write(fd[1], &c, 1);
}
});
ASSERT_TRUE(loop.RunLoop());
thread.join();
ASSERT_EQ(100, count);
// Test retry_count to make sure we are not doing blocking read.
ASSERT_GT(retry_count, 0);
close(fd[0]);
close(fd[1]);
}
TEST(IOEventLoop, write) {
int fd[2];
ASSERT_EQ(0, pipe(fd));
IOEventLoop loop;
int count = 0;
ASSERT_NE(nullptr, loop.AddWriteEvent(fd[1], [&]() {
int ret = 0;
char buf[4096];
while ((ret = write(fd[1], buf, sizeof(buf))) > 0) {
}
if (ret == -1 && errno == EAGAIN) {
if (++count == 100) {
loop.ExitLoop();
}
return true;
}
return false;
}));
std::thread thread([&]() {
usleep(500000);
while (true) {
usleep(1000);
char buf[4096];
if (read(fd[0], buf, sizeof(buf)) <= 0) {
break;
}
}
});
ASSERT_TRUE(loop.RunLoop());
// close fd[1] to make read thread stop.
close(fd[1]);
thread.join();
close(fd[0]);
ASSERT_EQ(100, count);
}
TEST(IOEventLoop, signal) {
IOEventLoop loop;
int count = 0;
ASSERT_TRUE(loop.AddSignalEvent(SIGINT, [&]() {
if (++count == 100) {
loop.ExitLoop();
}
return true;
}));
std::atomic<bool> stop_thread(false);
std::thread thread([&]() {
while (!stop_thread) {
usleep(1000);
kill(getpid(), SIGINT);
}
});
ASSERT_TRUE(loop.RunLoop());
stop_thread = true;
thread.join();
ASSERT_EQ(100, count);
}
TEST(IOEventLoop, periodic) {
timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 1000;
int count = 0;
IOEventLoop loop;
ASSERT_TRUE(loop.AddPeriodicEvent(tv, [&]() {
if (++count == 100) {
loop.ExitLoop();
}
return true;
}));
auto start_time = std::chrono::steady_clock::now();
ASSERT_TRUE(loop.RunLoop());
auto end_time = std::chrono::steady_clock::now();
ASSERT_EQ(100, count);
double time_used = std::chrono::duration_cast<std::chrono::duration<double>>(
end_time - start_time)
.count();
// time_used is 0.1 if running precisely, and we accept small errors by using
// a range [0.1, 0.15).
ASSERT_GE(time_used, 0.1);
ASSERT_LT(time_used, 0.15);
}
TEST(IOEventLoop, read_and_del_event) {
int fd[2];
ASSERT_EQ(0, pipe(fd));
IOEventLoop loop;
int count = 0;
IOEventRef ref = loop.AddReadEvent(fd[0], [&]() {
count++;
return IOEventLoop::DelEvent(ref);
});
ASSERT_NE(nullptr, ref);
std::thread thread([&]() {
for (int i = 0; i < 100; ++i) {
usleep(1000);
char c;
write(fd[1], &c, 1);
}
});
ASSERT_TRUE(loop.RunLoop());
thread.join();
ASSERT_EQ(1, count);
close(fd[0]);
close(fd[1]);
}
TEST(IOEventLoop, disable_enable_event) {
int fd[2];
ASSERT_EQ(0, pipe(fd));
IOEventLoop loop;
int count = 0;
IOEventRef ref = loop.AddWriteEvent(fd[1], [&]() {
count++;
return IOEventLoop::DisableEvent(ref);
});
ASSERT_NE(nullptr, ref);
timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 500000;
int periodic_count = 0;
ASSERT_TRUE(loop.AddPeriodicEvent(tv, [&]() {
periodic_count++;
if (periodic_count == 1) {
if (count != 1) {
return false;
}
return IOEventLoop::EnableEvent(ref);
} else {
if (count != 2) {
return false;
}
return loop.ExitLoop();
}
}));
ASSERT_TRUE(loop.RunLoop());
ASSERT_EQ(2, count);
ASSERT_EQ(2, periodic_count);
close(fd[0]);
close(fd[1]);
}
|
